The children in "in Just-" are so innocent that they don’t even bother to be offended by the fact that their names are strung together in clumps of words. Only mature (or self-centered) folks would get concerned about things as silly as self-identity. Everything seems happy, but there may be danger on the horizon. Maybe the balloonman is only around to make children happy. Maybe he’s the signal, however, of a time when the children playing will be chasing after things they don’t need and can’t afford – just like the adults do. It’s a complicated world out there, kiddies. Balloonmen are just the beginning.
By ending "in Just-" with a return to the balloonman’s whistle, Cummings suggests that the balloonman plays a central role in maintaining the innocence and joy of spring.